Americans have developed a flexible fiber battery (2 photos)

In the laboratories of the Massachusetts Institute of TechnologyInstitute (MIT) engineers have created the world's longest flexible battery pack that can power fiber-optic electronic devices and sensors. A thin lithium-ion battery in the form of a long fiber can be woven into fabric and used in 3D-printed batteries of the most bizarre shapes.

Test experimental battery,presented by MIT engineers, is about 140 meters long, only a few microns thick, and a capacity of 123 mAh, which allows you to recharge your smartphone or smart watch. Scientists also presented an underwater vehicle powered by a 20-meter fiber battery wound around the body. It is noteworthy that the material from which the battery is "woven" does not lose electrolyte in the event of damage and is able to provide power to the devices even in the event of partial destruction.

In the manufacture of fiber batteriesspecial battery gels and standard fiber drawing technology were used, in which the process begins with a cylinder containing all the necessary components. The material is heated to a temperature just below its melting point, and then it is pulled through a narrow opening. As a result, all components retain their position, but "shrink" to the smallest possible diameter. The battery components, including lithium, are located inside the fiber and protected from the external environment by a water-impermeable material.

According to one of the project leadersTural Khudiyeva, using a fiber battery, it is possible to create complex objects with a built-in battery by 3D printing. The printing process is a one-step process and all the battery components are already inside the fiber.
Gel electrolyte and electrode providethe battery has high fire resistance, which was demonstrated when compared with a fiber-type test battery with liquid electrolyte, which instantly caught fire during the experiment.

Longest test device with built-inflexible fiber battery was an element of a bi-directional high-speed wireless communication system Li-Fi (Light Fidelity). MIT engineers have applied for a patent and expect fiber batteries embedded in wearable devices to hit the market in the next few years.